不同湿度海洋大气环境中AE44/MS 螺栓结构的初期腐蚀特性研究

林齐叠

doi:10.16577/j.issn.1001-1560.2023.0191

材料保护 >

2023 , Vol. 56 >Issue 8: 91 - 96

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0191

试验研究

不同湿度海洋大气环境中AE44/MS 螺栓结构的初期腐蚀特性研究

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上海工程技术大学机械与汽车工程学院，上海 201620

林齐叠(1995-)，在读硕士，研究方向为特种设备安全技术，E-mail:875557423＠qq.com

收稿日期: 2023-02-22

修回日期: 2023-03-12

录用日期: 2023-04-15

网络出版日期: 2023-08-25

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Preliminary Corrosion Behavior of AE44/MS Bolt Structure in Marine Atmosphere with Different Humidity

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School of Mechanical and Automotive Engineering，Shanghai University of Engineering Science，Shanghai 201620，China

Received date: 2023-02-22

Revised date: 2023-03-12

Accepted date: 2023-04-15

Online published: 2023-08-25

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摘要

在海洋气候环境中混合使用不同材料会形成电偶对加快结构腐蚀。对AE44/MS 镁合金板件钢制螺栓连接结构在1.6%NaCl 海洋大气环境中的腐蚀特性进行数值模拟，将大气环境中的相对湿度RH作为自变量，相对湿度分别取70%，75%，80%，85%，90%，95%。结果表明:AE44/MS 结构材料接触区域镁合金板件侧电流密度变化最大，说明构成的电偶对加速了镁合金板件在大气环境中的腐蚀。随着相对湿度的增大，AE44/MS 螺栓连接结构最大电流密度先增大后减小，在相对湿度RH＝90%左右时，其最大电流密度可达到16.7 A/m2，其最快腐蚀速率可达40 mm/a。

关键词： AE44/MS 结构; 电化学腐蚀; 相对湿度; 海洋气候; 数值模拟

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林齐叠 . 不同湿度海洋大气环境中AE44/MS 螺栓结构的初期腐蚀特性研究[J]. 材料保护, 2023 , 56(8) : 91 -96 . DOI: 10.16577/j.issn.1001-1560.2023.0191

Abstract

The mixed use of different materials in marine climate environment will form galvanic pair to accelerate structural corrosion.Numerical simulation was conducted on the corrosion characteristics of AE44/MS magnesium alloy plate steel bolted connection structures in a 1.6%NaCl marine atmospheric environment.The relative humidityRHin the atmospheric environment was taken as an independent variable，and the relative humidity was 70%，75%，80%，85%，90%，and 95%，respectively.Results showed that the current density of magnesium alloy plate side in the contact area of AE44/MS structure material changed the most，indicating that the formed galvanic pair accelerated the corrosion of magnesium alloy plate in atmospheric environment.With the increase of relative humidity，the maximum current density of AE44/MS bolted connection structure increased first and then decreased.When relative humidityRHwas 90%，the maximum corrosion current density could reach 16.7 A/m2，and the fastest corrosion rate was up to 40 mm/a.

Key words： AE44/MS structure; electrochemistry corrosion; relative humidity; marine climate; numerical simulation

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